Machine for rolling sheet metal



Dec. 11, 1928. 1,694,495

R. TRAFELET MACHINE FOR ROLLING SHEET METAL Fild Sept. 5. 1922 INVENTEIRATTORNEY UNIT'ED' sures PA'raNr orF1c -E.

nonm'u amaze-r, or rosroauQomo, ABSIGNOB, BY mane-r arm new: assrenmas,T ran zones. comm, or cmvnmn, 01:10, a conrom'non or one.

momma: FOB BOIiLn i'G SHEET Application fllcd fleptember 5, 1982. SerialHo. 588,177.

r This .invention relates to a machine for working'sheetmetal to form.This invention has utility when incorporated in a machine for giving thetwo direction she es in rolling to form fenders for motor vehlclewheels.

Referring to the drawings: Figure 1 is a perspective view of a rollingmachine embodying the invention herein disl0 closed;

Fig. 2 is a detail view, with parts broken away, of the pair of liveworking rolls; Fig. 3 is a detail view of the'worklng rolls for secondstage operation; and

Fig. 4 is an end elevation of the working rolls, parts being brokenaway.

' 1 indicates a machine frame shown as'carrying fulcrum pin 2 for clutchlever 3 connected bylink 4 to rock arm 5 in throwing clutch 6 0 frommedial disconnected position, to driving position in one direction whenconnected to the pulley 6' as driven by the belt 7. For reversedirection driving, the clutch 6 is thrown T into engagement with pulley8 driven by the 25 belt 9 in an opposite direction from the'pulley 6'.

Driving from the ulley 6' or the pulley 8 is effective throug pinion 10to actuate gear 11 as a speed reduction drive for shaft 30 12 in theframe 1. Fast with the shaft 12 is gear 13, adjacent the gear 11. Thisgear 13 is in mesh with similar gear 14 on shaft 15 parallel to theshaft 12. The sheet metal stock to be worked by passing and repasslng 35may be guided to the machine by fixed guide Q 16 to pass through theworking rolls to guide 17 carried by arms 18 having segments in meshwith segments '19 on rock shaft 20 carried by the frame 1 parallel toand below-the 4o shaft 12. By forcing handle 21 downward the guide 17-may be lifted to impart wheel radius curve'to a fender being formed. Thelimit of this curvature may be determined by arm 22 coming against stop23 on the frame 45 1. This arm 22, fast with the shaft 20 has an so 28for moving the shaft .15 awayfrom the shaft 12, for access to theworking rolls.

Fixed on the shaft 15 by keys 29 are and disks 30 having opposmgcentering projecting rings 31 for entering seats 32, and there-, 56 bycarrying intermediate convex working concave roll mounted on the shaft12' in the v following manner: 36 is a'sleeve fixed to the roll section33. These three sections 30, 33, 30, are held together in assembledrelation by bolts 34. Coacting with convex roll 30,- 33, 30,is a

shaft 12 by a key and arranged to support the intermediate sectionindicated at 37, of the concave roll. The oppqsite ends of the rollsection. are dove-tailed, as shown 'at 38,. these ends interfitting withdove-tailed termi nal sections 39. These roll sections 39, 37, 39, arepreferably splined on thesleeve 36 byWadsworth keys 40. On-threaded ends41 of the sleeve 36 are disks 42, which may be run up to the adjustedpositions on the sleeve by engaging a tool in the recesses 43. Bolts 44countersunk and loose with the disks- 42 extend therethrough toward theterminal roll sections 39, to engage plates 45, secured in any wellknown wa to the outer faces of the sections 39. 46 in icates coiledsprings mounted in pockets 47 formed in the inner faces of the disks 42and normally engaging the sections 39 to move them inwardly or towardthe section 37, to the extent permitted by the heads of the bolts 44engaging the disks 42; whereas the latter disks 'determine the maximumspread of the sections 39. By adjustmentof the bolts 44 the movement of.the sections 39 under the influence of the springs 46 may be increasedor decreased. Therange of yielding is thus determined by'the bolts 44,-while the maximum width for the roll is determined b the adjustment ofthe disks 42 on t e sleeve 36. The dovetailed portions, due to theirinterfitting, not only additionally key the sections 39, 37, 39, forcommon angular travel, but maintain continuity for uninterrupted workingsurfaces upon the stock. The strong spring action of the terminalsections 39 upon the bent up or skirt edges of a crown fender, holdsuch' marginal ofl'set portions for smooth forming. There isthus-efiective 10o ironing out of wrinkles, or rather action precludingeven initial forming of such.

As there may be wear upon the greater duty terminal sections 30, suchwear may be taken up by keeping the faces between the 105:

sections machined, and inserting shims for the desired wear take-up.

1 For niceties of adjustment, or for taking care of gaglevariationsfrom-that originally designed, t

e dove-tailed interfittingtongues no may" have their free ends machinedoff. i There is accordingly in the disclosure a wide i so - scopethereof. *My disclosures and the de- 6, and

range for all a justments which. may be readily cared for directly onthe rolling machine, and directly upon the rol1s, without theinterposition of any special or cumbersome apparatus, or any danger ofanything.

letting go to cause injury.

The detachable or readily replaceable terminal sections for the workingrolls permit a greatly increased range in character ofoutput. A regularcrown fender 48 may have skirt or marginal flanges 49 thereon, say to beterminally beaded and wired. However,

in the formation of a continuous crown 50 (Fig. 2), such may be thefirst stage, and with substitution of terminal sections 51, 52,respectively, for the terminal sections 30, 37, (see Fi 3) offsets 53may be formed from the me ial crown portion 50, which offsets 53 areadjacent skirts or marginal flanges 49. This sequence of rolling orworking of the initial flat sheet metal stock, back and forth throu hthe machine, by reversing the clutch simultaneously taking care of thewheel radius arc in controlling the handle 21, permits of high gradesmooth clean product turned out with ra idity. On the convex live rollthere may be disposed between the medial section 33 and the terminalsections 51, shims ention relates many chan es in construction and wideldiflering embo iments and applications o my invention will suggest temselves without departing from the spirit and scription herein arepurely .illustrative and are not intended to be in any sense limiting.What is claimed and it is desired to secure by Letters Patent is 1. Arolling-machine embodying a pair of opposing live working rolls forpassing sheet metal therebetween, one of said rolls being convex and theother concave and each being in three sections, the sections of saidconcave roll being relatively movable on the axis thereof during thepassing of a sheet between said rolls. 7 i i 2. In a machine of theclass described, the combination of a shaft, a concave roll comprisingan intermediate section and outer side sections movable relative to saidintermediate section, relatively stationary devices disposed adjacentthe outer sides of said outer sections, and expansion means interposedbetween each said devlce and the ad acent roll section normally tendingto move it toward said interthe intermediate section along the axis ofsaid concave roll.

4. In a machine of the character described, the combination of a pair ofworking rolls for passing sheet metal in the forming thereof, one ofsaid rolls being relatively fixed and the other roll embodying anintermediate relatively fixed section and a pair of outer relativelyyieldable terminal'sections.

5. A sheet metal rolling machine embodying a convex Working rollincluding an intermediate section and a pair of terminal sections, and asecond roll havin outomatically independently movable shaping cheeks0pposing the convexroll terminal sections.

6. A sheet metal rollin machine embodying a concave working rolcomprising a plurality of sections having longitudinally inter:

fitting elements arranged to maintain substantial peripheral continuityof the rolls,

and means tending to yieldingly maintain said sections in assembledrelationship.

7. A sheet metal rolling machine consistin ofva pair of relatedcomplementary space rollersbetween which a section of said metalthereof, devices adjustably engaging said shaft at Opposite ends of saidroll, and a spring between each said device and the adjacent outersection tending to move the latter toward the inner section of saidroll. In witness whereof I afiix my signature. ROBERT TRAFELET.

